In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 

[EX Q]: [header] How to find the number of a blocked call [title] Get an private branch exchange (pbx) account. [step] One option is asterisk, a free, open source software. Another is switchvox. <sep> (A) This will also work better than 200 blackwire. If you buy one, it will work with the same account ($ 0.11). (B) The pbx is considered to be a free exchange. While this service typically does not have much use for a desktop account, it gives you access to many anonymous call accounts. (C) A pbx converts your computer into a telecommunications device and will allow you to manipulate incoming call data to identify blocked callers. [substeps] Before embarking on this method ensure that you thoroughly understand the technical challenge it presents and the potential financial burden it incurs. (D) Without switchvox here you are on better business. No other option is available to get a contact number from an online website.
[EX A]: C

[EX Q]: [header] How to start a taxi company [title] Investigate whether there's a need for a taxi company in your area. [step] In smaller towns, the demand for taxis usually isn't so high, so considering a different location to start a taxi company might be a wise choice. [title] Determine your niche. <sep> (A) [step] What is the ideal type of taxi company or whether the need is a strong job market. However, there's also a reason you could (and probably should) start a taxi company for a fee. (B) [step] Taxi companies and vegans have a pressing concern in their treatment for foreigners in countries. Decide what you wish to be used for based on your niche and behaviors when applying for a taxi company. (C) [step] Though most taxi companies cater to all types of customers, there are those that cater to high-end clientele such as politicians, diplomats, and executives. Other taxi companies offer adapted vehicles for the physically impaired, while yet others provide green taxis for environmentally-conscious customers. (D) [step] To start a taxi company, you will first need to determine your own niche, and how much money you're willing to spend on the service. This is where you'll be able to make the hiring process go more smoothly.
[EX A]: C

[EX Q]: [header] How to calculate the finance charge on a credit card balance [title] Know what a finance charge is. [step] Credit card terms can be confusing to navigate for many, so understand what a finance charge is and how it affects you. [substeps] A finance charge is what allows credit card companies and lenders to make a profit off of you. <sep> (A) It's more or less a fee charged for the use of your credit card. Finance charges on credit cards, mortgages and car loans have ranges that depend on a borrower's credit score. (B) A cash charge is when a company brings in a bank statement or a check and debts from the statement of that paycheck. A finance charge is what the bill is, essentially, provided the debtor is a credit card company and not a lenders. (C) A credit card charge is an immediate cost of the purchase of your car. When you borrow money from the bank, interest and fees are added together in a charge to make up for the balance, thus reducing your interest payments. (D) It is usually under 10% of the amount borrowed to the company unless your credit card company commits a penalty. If you are in a high interest category that allows you to charge interest on your bank statements, choose the " freeze " option to compute a charge.
[EX A]:
A

